Hashimoto Michinao, Garstecki Piotr, Whitesides George M
Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford St., Cambridge, MA 02138, USA.
Small. 2007 Oct;3(10):1792-802. doi: 10.1002/smll.200700238.
A method is described for the formation of stable, composite aqueous emulsions of 1) combinations of distinct families of bubbles of nitrogen, 2) combinations of distinct families of droplets of an organic fluid (either perfluoro(methyl)decalin or hexadecane), and 3) combinations of bubbles and droplets. A system of two or three microfluidic flow-focusing units is coupled to a single outlet channel. The composite emulsions can be precisely tuned, both in their composition and in the number fraction of components--either bubbles or droplets--of different types. The use of microfluidic technology, with closely coupled flow-focusing units, guarantees that the emulsions are mixed locally at a controlled local stoichiometry. The emulsions self-assemble in a nonequilibrium process to form a wide variety of highly organized periodic lattices.
本文描述了一种形成稳定复合水乳液的方法，该乳液包含：1）不同族氮气气泡的组合；2）有机流体（全氟（甲基）萘烷或十六烷）不同族液滴的组合；3）气泡与液滴的组合。由两或三个微流控流动聚焦单元组成的系统与单个出口通道相连。复合乳液在其组成以及不同类型组分（气泡或液滴）的数量分数方面均可进行精确调节。采用紧密耦合流动聚焦单元的微流控技术可确保乳液以可控的局部化学计量比在局部混合。乳液在非平衡过程中自组装形成多种高度有序的周期性晶格。
